Electrical warp stop motion



Nov. 17, 1931. J. REGAN 1,832,580

ELECTRICAL WARP STOP MOTION Filed Sept. 5. 1929 fvvav 727R JUH/V R5 SANA TFQRNE r5 Patented Nov. 17, 1931 UNITED STATES PATENT OFFICE} JOHNREGAN, OF NEW BEDFORD, MASSACHUSETTS, ASSIGNOR T0 CROMPTON 8c KNOWLESLOOM WORKS, 0F WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTSApplication filed September 5, 1929. Serial No. 390,500.

This invention relates to improvements in electrically operated warpstop motions more particularly for looms and it is the general object ofthe invention to provide means for retaining the indication for stoppinguntil a predetermined point is reached in the cycle of the operation ofthe loom.

When there is a fault in the warp it is desirable to stop the loom withthe lay in a given position, for instance, in back position, so thatupon starting up the filling will be given the full blow of the lay tobeat in the filling properly. In electrically operated warp stop motionsthe closing of the circuit is likely to oc cur'at any point, dependingupon when the warp fault occurs. It is an important object of my presentinvention to provide an electrically operated control device which canbe retained in knocking-off position until the desired point in thecycle of the loom is reached, at which time a regularly moving actuatorwill effect loom stoppage;

With these and other objects in view which will appear as thedescription proceeds, my-

invention resides in the combination and ars rangement of partshereinafter described and set forth in the claims.

In the accompanying drawings wherein a convenient embodiment of myinvention is set forth,

Fig. 1 is a side elevation of a loom having my invention appliedthereto, certain parts being removed for the sake of clearness,

Fig. 2 is a side elevation on an enlarged scale of the controller andassociated parts as shown in Fig. 1, 3

Fig. 3 is a horizontal section taken on line 33 of Fig. 2,

Fig. 4 is a detailed side elevationof the latch or trip which retainsthe indication,

Fig. 5 is a perspective View showing therelation between the latch andthe connector rod, I

Fig. 6 isa detailed vertical section on an enlarged scale on line 66 ofFig. 1, and

Fig. 7 is a detail plan view of the solenoid and its mounting, lookingin the direction of arrow 7, Fig. 2.

Referring to Fig. 1, I have shown a loom frame 10 supporting aconstantly rotating shaft 11 on which is mounted a cam 12 having a point13 to cooperate with cam lever 14 pivoted to the frame at 15. The upperend of the lever is provided with an actuator knife edge 16 which duringnormal operation of the loom reciprocates, moving rearwardly from theposition shown in Fig. 1 either every pick of the loom or every secondpick of the loom, depending upon the rate of rotation of the shaft 11.

Each bank of drop wires 17 is guided by an electrically charged bar 18passing through the drop wires which rest on the warp W. Between pairsof banks of the drop wires I locate electrode rods 19, there being twobars set forth in Fig. 1. It is to be understood that the electrodesorrods 19 are electrically connected by means of wires 20 to one side of abattery P, and that the bars 18 are all electrically connected to a wire21 which is connected through devices to be described to the oppositeside of the battery P.

A shipper handle 22 is secured to shipper rod 23 and isoperativelyrelated to the upper end of a rocking lever 24. The latter is pivotedintermediate its ends as at 25 to a.

fixed part of the loom and has the lower end usual construction and ofthemselves form no part of my present invention.

In carrying my invention into effect I provide a supporting rod 30 whichis secured in any approved manner to the loomside and mount thereon aframe 31 having a split hub 32 which is gripped tightly to the rod bymeans of a bolt 33. Extending upwardly from said frame is an arm 34having secured thereto a solenoid 35. The latter is held in verticallyadjusted position by means ofa strap -36 and bolt 87, as shown in Fig.7.

A core 38 extends loosely through the solenoid and has the lower endprovided with an eye 39 through which extends a rod 40.

The latter has mounted for adjustable movement thereon a weight 41 heldin adjusted position by set screw 42. The rod extends into a hub formedon lever 44 and is held in position by set screw 45. Lever 44 is pivotedon a. stud 46 held to frame 31 by means of set screw 47. The lever 44has a depending arm 48 provided with an eye 49 through which extends therear end of the previously described rod 28. The latter has the rear endthereof hooked as at 50 to cooperate with the actuator or knife edge 16.

A. s cond hub 51 formed as part of the frame 3t has held therein foradjusted longitudinal position by means of set screw 52 a. supportingrod 53 which is slotted as at 54, see Fig. 5. A latch 55, preferably ofsheet metal, is pivoted to the rod 53 in the slot by means of a pin 56.A. small finger 57 on the latch extends under the rod 53 and limitsmovements of the latter in a counterclockwise direction as viewed inFig. 4. The lower end of the latch is provided with a downwardly andrearwardly extending cam face 58, while the under side of the latch ispreferably horizontal as at 59. The latch may be COLll'ltQIWQlglltQCl toremain normally in the position shown in full lines, Fig. 4.

A small, wire 60 is secured to the rear end of the rod 28 and extendsnormally over the inclined cam 58 and is out of alignment with respectto a vertical line passing through a pivot 56 in a direction toward thefinger 57. Rotation of the rod 28 is prevented by reason of the factthat the head 27 has a rectangular portion 61, see Fig. 6, which movesin a slot 62 formed in a guide stand 63 for said head, the stand beingsecured to the loom frame in any approved manner.

Under normal conditions, when all the drop wires are elevated, theweight 41 will counter-balance the arm 48 and the rod 28 so that thehook O lies above the actuator knife 16. The latter is moving in itsusual manner will therefore not engage the rod 28 and the latter,together with the shipping mechanism, will be left in running position.then one or another of the drop wires falls, however, current will flowfrom the battery P over wire 70, through the solenoid 35, through wire21 to the bar 18 which is in contact with the fallen drop wire, throughthe latter to the rod 19 contacting therewith, and from the rod overwire back to the battery P. Current flowing in this circuit willenergize the solenoid, causing the latter to draw its core 38 upwardly,overpowering the weight 41 and rocking the lever 44 around the stud 46in a counter-clockwise direction as viewed in Fig. 2. T he arm 48 andthe rod 28 will therefore move downwardly and the wire 60, in movingdown with the rod 28, will engage the inclined cam face 58 and rock thelatch from the full to the dotted line position shown in Fig. 4.

The rod 28 will give sufficient movement to the rod 60 to move thelatter below the latch, whereupon the latter will move back to the fullline position shown in Fig. 4, said wire engaging the substantiallyhorizontal undersurface 59 of the latch. Should the solenoid becomedeenergized because of vibration of the fallen drop wire, the core willtend to fall together with the weight 4'l, but the wire 60 will berestrained from upward movement by the latch and the rod 28 willtherefore be held down. Under the conditions last described the book 50will be in down position and as the knife edge 16 moves rearwardly thesetwo parts will be engaged and the lever 14 will act through connectorrod 28 to rock the lever 24 to the right as viewed in Fig. 1, the effectof which is to stop the loom.

It is to be understood that by reason of the mountings of rods 40, 4'3and 5 5 the several parts carried thereby can be adjusted and it is alsoto be understood that by reason of set screw 37 and strap 36 the forceexerted by the solenoid on the core 38 may be Varied within limits.

From the foregoing it will be seen that I have provided means forretaining an indication from an electrical warp stop motion so that eventhough jarring of the loom should break tie circuit which gives theindication, mechanism will nevertheless be operative to stop the loom atthe predetermined time. It will further be seen that by changing thelocation of the split hub 32 on the rod by means of the nut 33 I mayvary the vertical location of the hook with respect to the knife edge16. Furthermore, the location of the weight 41 can be varied to lessenthe amount of pull which must be exerted by the solenoid in order tolower the rod 28. Also, it will be seen that when in retained positionby the latch the rod is so related to said latch that any upward forcewhich might be exerted by the weight 41 with the solenoid deencrgizedwill tend to hold the latch in retaining position.

Having thus described my invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

1.111 a warp stop motion, a regularly moving actuator, a knock-offmember, a lever operatively connected to the member, a solenoid, a corefor the solenoid, a core for the solenoid operatively connected to thelever, the solenoid to be energized upon occurrence of warp fault toattract the core and to cause rocking of the lever to effect movement ofthe member into the path of the actuator, a latch normally out ofholding relation with respect to the member, the latter when moviuu inginto the path of the actuator engaging the latch to move the same out ofnormal position, the latch thereafter returning to normal position tohave engagement with the member to hold the same in the path of theactuator independently of the solenoid, said member having a laterallyextending element to engage the latch, and a means to prevent rotationof the member about its 10 longitudinal axis.

2. In a warp stop motion, a regularly moving actuator, a knock-0E memberpositioned for direct engagement with the actuator at warp fault, alever operatively connected to the member to determine the position ofthe latter, a solenoid and core therefor connected to the lever to rockthe lever when the solenoid is energized and move the memher into thepath of the actuator, a relatively 20 fixed element, and a latch to beinterposed between the member and element when the solenoid isenergized, the latch to have direct holding engagement with the knockofimember to maintain the latter in the path of the actuator during theinterval between energization of the solenoid and engagement of theactuator and knock-oft" member.

In testimony whereof I have hereunto so afiixed my signature.

JOHN REGAN.

